A - Human Necessities – 47 – B
Patent
A - Human Necessities
47
B
342/22.1
A47B 53/02 (2006.01)
Patent
CA 1221441
Abstract of the Disclosure One or more movable storage units each having a reversible motor for driving the units on tracks between stationary storage units to open an aisle between units. Each unit has leash cord plug holders on its aisle sides. The movable units have safety sweep bars on one or both sides, safety switches actuated thereby, and a limit switch. Setting a leash cord plug in its own holder so the leash does not span the aisle that is to be opened provides a move command signal and setting the other leashes so they span the aisles that are too close sets up the control circuitry for causing all units to be driven away from the aisle that is not spanned by a leash. AND gate circuits must simultaneously have input signals indicative of the limit and sweep switches being true, of the leashes being in spanning condition and true for all aisles that are too close and a command signal resulting from having a leash plug in its own holder before the gates will issue a signal that causes the motors to drive in the proper direction. Time delay devices are pro- vided for keeping the sweep switches untrue, at least long enough for an obstructing person to get out of a closing aisle before the drive motors are activated again.
461849
Smart & Biggar
Spacesaver Corporation
LandOfFree
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